Tactical Use of MIL-DOT Scopes: How to Calculate Bullet Drop

In tactical shooting, precision is everything. Whether you’re a competitive shooter, a hunter, or in law enforcement, understanding how to adjust for bullet drop can make the difference between a clean hit and a missed opportunity. One of the most effective tools for making these calculations is the MIL-DOT scope. In this article, we’ll dive into the tactical application of MIL-DOT scopes, how to calculate bullet drop, and compare MIL vs MOA systems to help you determine which reticle suits your style. We’ll also explore how scope magnification distance charts and MOA shooting principles can enhance your long-range accuracy.

What Is a MIL-DOT Scope?

A MIL-DOT scope uses a reticle with evenly spaced dots, or “mil dots,” designed to measure angles in milliradians (MILs). These dots allow the shooter to estimate range, compensate for wind, and adjust for bullet drop without having to make physical changes to the rifle setup.

A milliradian is 1/1000 of a radian, and it translates to approximately 3.6 inches at 100 yards or 10 cm at 100 meters. With this system, shooters can make quick and precise estimations on-the-fly in the field.

MIL vs MOA: Understanding the Difference

One of the most debated topics in precision shooting is the MIL vs MOA comparison.

• MOA (Minute of Angle): MOA represents 1/60th of a degree. At 100 yards, 1 MOA equals approximately 1.047 inches. This system is popular in the U.S. and is known for its fine adjustment capabilities. Many hunters and civilian shooters prefer MOA due to familiarity and precision in smaller increments.
• MIL (Milliradian): MIL is a metric-based system, with each MIL equaling 3.6 inches at 100 yards. It is widely used in military and law enforcement due to its simplicity in calculating distance and ease in tactical applications.

Key differences:

Choosing between mil vs moa ultimately comes down to personal preference, training, and intended use. Tactical shooters may lean toward MIL for quicker range estimation, while MOA shooting enthusiasts appreciate the refined control.

Calculating Bullet Drop with MIL-DOT

The tactical scope equipped with a MIL-DOT reticle allows the shooter to estimate how much bullet drop to expect at different distances. Here’s a simple step-by-step method to calculate it:

Step 1: Determine Range to Target

Use the mil dots to estimate the range. This can be done using the formula:

Target Size (in yards) × 1000 / MILs = Distance in Yards

For example, if your target is 6 feet tall (2 yards) and it spans 4 mils in your scope:

2 × 1000 / 4 = 500 yards

Step 2: Reference Ballistics Data

Refer to your bullet’s ballistic table to know how much drop occurs at the calculated range. For example, a .308 round may drop 55 inches at 500 yards.

Step 3: Convert Bullet Drop to MILs

To compensate with your MIL-DOT scope, convert the drop to mils using:

Drop (inches) / 3.6 = MILs at 100 yards

Then multiply by the distance in hundreds of yards. So at 500 yards:

55 / (3.6 × 5) ≈ 3.05 MILs

Dial up 3.1 MILs or hold over using the mil dots.

The Role of Scope Magnification in Bullet Drop Compensation

Scope magnification can directly affect your reticle’s function — especially in second focal plane (SFP) scopes. Unlike first focal plane (FFP) scopes where the reticle scales with magnification, SFP scopes only allow accurate mil-dot spacing at a specific magnification (usually max).

This is where the scope magnification distance chart becomes essential. It provides pre-calculated values for bullet drop, wind drift, and holdovers at various magnifications and distances. Many tactical shooters keep this chart attached to their rifle stock or wrist for quick reference.

MOA Shooting and Bullet Drop

If you use an MOA-based tactical scope, bullet drop compensation follows similar principles, but the math is different:

• Determine bullet drop in inches at your target distance.
• Convert inches to MOA: Drop (in inches) / 1.047 = MOA @ 100 yards
• Divide by the number of 100-yard increments to get the needed adjustment.

Example: If your bullet drops 70 inches at 500 yards:

70 / 5.235 (1.047 × 5) ≈ 13.4 MOA

You would dial up 13.4 MOA or hold using your MOA reticle’s hash marks.

MOA shooters often prefer this system for target shooting, where extreme precision matters and range estimations can be done in finer increments.

Tactical Applications of MIL-DOT Scopes

Beyond bullet drop, MIL-DOT scopes are powerful tools for:

1. Range Estimation – Crucial for military snipers and hunters who must gauge distances without a rangefinder.
2. Windage Compensation – Wind drift can be estimated using the same mil-dot reticle. Shooters often use wind charts or experience to adjust holds.
3. Target Tracking – During moving engagements, knowing how many MILs to lead a moving target ensures a successful shot.
4. Holdover and Hold-under – Allows rapid adjustment without turning turrets—ideal for fast-paced tactical scenarios.

These tactical benefits make mil-based scopes the go-to choice for dynamic environments.

MIL-DOT vs. BDC Reticles

Some shooters confuse MIL-DOT with BDC (Bullet Drop Compensation) reticles. While BDC reticles are calibrated for specific calibers and distances, they lack the flexibility and universal applicability of MIL-DOT scopes. In tactical use where you might switch ammo types or encounter unpredictable conditions, MIL-DOT reticles offer greater adaptability.

Building Your Custom Scope Magnification Distance Chart

Creating your own scope magnification distance chart tailored to your ammo, rifle, and scope magnification is key for reliable performance. Here’s how:

1. Chronograph your ammo – Get actual muzzle velocity.
2. Use ballistic calculator tools – Apps like Strelok or Ballistic AE.
3. Test at the range – Validate drop data at key intervals (100, 200, 300 yards, etc.).
4. Record adjustments in MIL or MOA – Based on your reticle system.
5. Print and laminate – Keep your chart accessible in the field.

Final Thoughts: Choosing the Right Tactical Scope

Whether you’re a precision shooter or a tactical operator, understanding MIL-DOT reticles, MOA shooting mechanics, and how to use a scope magnification distance chart is essential. Both mil vs moa systems are effective—what matters is training, consistency, and knowing how to make the math work under pressure.

Invest in a high-quality tactical scope, spend time understanding its reticle system, and practice calculating bullet drop in various conditions. With these tools and skills, you’ll not only improve your shot placement but also gain a tactical edge in the field.